Monolithic Power Systems Inc. EV8720-Q-00A

Overview

EV8720-Q-00A from Monolithic Power Systems is an evaluation board for the MP8720GQ synchronous buck converter IC, designed to validate high-efficiency 10A power delivery for DDR memory and USB Type-C applications. It supports 4.5V–26V input, delivers adjustable 0.8V–5.5V output, features adaptive COT control, DC auto-tune loop, and adjustable current limit (8.5A–16.5A) via external resistor.

For engineers reviewing the EV8720-Q-00A datasheet, EV8720-Q-00A pinout, EV8720-Q-00A application, or EV8720-Q-00A equivalent, this board enables rapid validation of MP8720GQ's fast transient response, CLM tuning, MODE selection (CCM/DCM), thermal performance, and compatibility with POSCAP/ceramic output capacitors in real-system conditions.

Technical Context

The EV8720-Q-00A implements the MP8720GQ IC in a fully assembled, tested 64mm × 64mm PCB layout with optimized power routing, thermal vias, and decoupling-supporting 700kHz fixed-frequency operation and adaptive constant-on-time (COT) control. It integrates all critical passives: 22μF/25V input ceramics (C1A/B), 47μF/10V output ceramics (C2B/C/C/D), 1.5μH/14A shielded inductor (L1), and precision mode/CLM resistors (R4, R12, R5, etc.).

Board-level functionality includes EN-controlled startup, selectable pulse-skip or forced CCM via MODE pin resistor network, valley-current-limit adjustment via CLM pin resistor, and latch-off reset on overcurrent/overvoltage/undervoltage/thermal fault. All protections are hardware-asserted and observable at test points.

Key Specifications

Availability

EV8720-Q-00A is available at Aetrix Electronics and suitable for DDR memory power validation, USB Type-C PD sink design verification, motherboard VRM prototyping, and distributed 5V/3.3V rail development requiring stable component supply and repeatable lab characterization.

Supply support for EV8720-Q-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP8720 product line targets high-density, fast-transient point-of-load regulation for computing and portable systems-specifically engineered for IMVP9-compliant DDR memory rails and USB Type-C power delivery sinks.

FAQ

What input voltage range is supported on the EV8720-Q-00A board?

The board accepts 4.5V to 24V DC input via VIN and GND terminals, matching the MP8720GQ's rated operating range. Input must be supplied from a stable bench source; reverse polarity protection is not implemented. The 24V upper limit ensures safe operation of input capacitors (25V-rated) and avoids overstress on the internal 30V MOSFETs.

How do I configure the output voltage and current limit?

Output voltage is set by the R4/R6 resistor divider on the FB pin (0.8V reference); default is 5V. Current limit is adjusted via resistor from CLM pin to GND: 0Ω = 8.5A, 90kΩ = 10A, 150kΩ = 13A, open = 16.5A. Resistor values must be 1% tolerance; configurations are documented in Tables 1 and 2 of the Rev. 1.0 user guide.

Does the board support both CCM and DCM operation?

Yes-MODE pin resistor selection determines both output voltage range and conduction mode: 0Ω → DCM for Vo < 3V; 90kΩ → CCM for Vo < 3V; 150kΩ → CCM for Vo ≥ 3V; >230kΩ or floating → DCM for Vo ≥ 3V. This enables efficiency optimization across light- and heavy-load conditions without firmware changes.

Can I use the EV8720-Q-00A for thermal testing under full load?

Yes-the board includes thermal vias under the MP8720GQ QFN-40 package and uses 2oz copper layers to sustain 10A continuous output at 5V with ≤40°C temperature rise (measured at ambient 25°C, free-air convection). Heatsink attachment is not required but recommended for extended 100% duty-cycle stress tests.

Are the input and output capacitors soldered or socketed?

All capacitors-including 22μF input (C1A/B), 100nF bypass (C1C/C2A), 47μF output (C2B/C/C/D), and 220nF soft-start (C3)-are permanently soldered in standard 0603/0805/1206 footprints. No sockets or jumpers are provided; replacement requires rework with hot-air station and appropriate ceramic capacitor specifications.

Is there a way to monitor switching node or enable timing?

Yes-test points TP1 (SW), TP2 (EN), TP3 (FB), TP4 (CLM), and TP5 (MODE) are labeled and accessible. SW node allows oscilloscope probing of gate drive and inductor current slope; EN and MODE pins support logic-level signal injection for sequencing and mode validation without soldering.